how does coercivity and retentivity depend on the width of hysteresis curve?

Coercivity is the measure of the resistance of a ferromagnetic material to becoming demagnetized. This value is obtained when a magnetic field is applied to magnetize a ferromagnetic material.

Retentivity is the magnetization left in the ferromagnetic material even when the external magnetic field is reduced to zero.

The graph represents how Coercivity and Retentivity are dependent on the width of the hysteresis curve.

The position of the red dot indicates the induced magnetic field in the ferromagnetic material when the external magnetic field is removed. The blue dot indicates how strong is the external magnetic field in the reverse direction to demagnetize the induced magnetic field completely.